I am getting that too. It looks like Opera may have rescinded the Skippa's Opera TV Store license status.

Thankfully it still works, and the red triangle vanishes when you open an app. On the My Apps menu the red triangle almost covers the ( + ) menu that contains, amongst other things, the remove app from My Apps option. If you want to remove an app from My Apps go up to the top menu, scroll to the right to where the ( + ) button is hiding and press OK.